TOSHIBA 32bv500b screen stops working sound works fine

SOURCE: got a new T-con but no luck

is your back light constantly on when you are not changing channels.if so replace the main board. can you see a menu if you hit the menu button ? that is generated by your main board..... replacing the t-con will only correct vertical lines in the pic.

SOURCE: Westinghouse lvm-47w1 picture goes dim

Hello, I can tell you from experience that this is an inverter issue. Both the master and the slave have several transformers and sometimes you can't tell if they are damaged or not. I would recommend testing the leads from the inverters to make sure which one of the two is the one causing the dim picture.

Bud Martin

• 11361 Answers
• Posted on Oct 04, 2010

SOURCE: I have an insignia NS-LCD37HD that has backlight

Chec to see if you are getting 12vdc at the T-CON board power input pin first.
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board.
if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having.

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide

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http://en.wikipedia.org/wiki/Capacitor_plague

Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.

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SOURCE: What are the parts mounted on top of the LCD

There is T.con board use as a output for LCD panel.Input come from Main board. One power supply board and invertor board for back light.Thats all have in side LCD TV.

SOURCE: My toshiba 42" REGZA 42RV535U

U have sound but no picture?Picture does flashes a few sec?Yes,than those 2 long LCD inverter boards are dead.Tries websites like Shopjimmy.com,Ebay.com to buy those 2 long LCD inverter boards for the replacement.